Bug 2542577 (CVE-2026-101901)

Summary: CVE-2026-101901 axios: Axios: Denial of Service via unhandled error in HTTP/2 session initialization
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Axios. A remote attacker or an unresponsive endpoint can cause a Denial of Service (DoS) by triggering an error during HTTP/2 session initialization or reuse. Because the underlying session fails to register proper error handlers, network or session failures result in an uncaught exception that abruptly terminates the application process.
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Description OSIDB Bzimport 2026-09-28 17:37:24 UTC 
Axios is a promise-based HTTP client for the browser and Node.js. From 1.13.0 until 1.20.0, Http2Sessions does not install adequate error handling for a ClientHttp2Session during Axios HTTP/2 session initialization or reuse. A request uses httpVersion: 2 and the ClientHttp2Session emits an error during session initialization or reuse. The unhandled session error escapes normal Promise rejection handling. The uncaught error can terminate the Node.js process and cause denial of service. This issue is fixed in version 1.20.0.